If the ground cools rapidly but the air is very dry why will less dew form?
Answer and explanation
Correct answer: Because dry air does not contain sufficient water vapour for condensation
Dew forms when air near the ground cools to its dew point and its water vapour condenses into tiny droplets. Very dry air contains little water vapour, so even rapid cooling provides less vapour to condense and less dew forms. Option A is incorrect because a cool surface promotes condensation. Exam tip: For dew formation, remember both cooling to the dew point and adequate moisture in the air.
Frequently asked questions
What is the correct answer to this question?
Because dry air does not contain sufficient water vapour for condensation
Why is this the correct answer?
Dew forms when air near the ground cools to its dew point and its water vapour condenses into tiny droplets. Very dry air contains little water vapour, so even rapid cooling provides less vapour to condense and less dew forms. Option A is incorrect because a cool surface promotes condensation. Exam tip: For dew formation, remember both cooling to the dew point and adequate moisture in the air.
Which subject and chapter does this question cover?
This is a Class 12 Geography question. Chapter: Water in the Atmosphere. Topic: Humidity, evaporation, and condensation.
